#define _CRT_SECURE_NO_WARNINGS 1

class Solution {
public:
    vector<int> swapNumbers(vector<int>& numbers)
    {
        numbers[0] = numbers[0] ^ numbers[1];
        numbers[1] = numbers[1] ^ numbers[0];
        numbers[0] = numbers[0] ^ numbers[1];
        return std::vector<int> { numbers[0], numbers[1] };
    }
};